Information
The topic you requested is included in another documentation set. For convenience, it's displayed below. Choose Switch to see the topic in its original location.

Migration Tips

The two primary areas of concern when examining your code for 64-bit compatibility are as follows:

  • Address calculations
  • Pointer arithmetic

For many reasons, developers have stored addresses as a ULONG value. After all, on 32-bit Windows, an address, a pointer, and a ULONG value are all 32 bits long. However, on 64-bit Windows, an address and a ULONG are not the same length. While a ULONG remains a 32-bit value, all pointers are now 64-bit values.

In this Section

 

 

Community Additions

Show:
© 2014 Microsoft